title: Primum non nocere.
mesh_terms: D002648:Child; D003287:Contrast Media / Q000009:adverse effects*; D006801:Humans; D009381:Neoplasms, Radiation-Induced / Q000209:etiology*; D011829:Radiation Dosage; D012306:Risk; D013911:Thorium Dioxide / Q000009:adverse effects
chemical_list: D003287:Contrast Media; D013911:Thorium Dioxide